关于springboot:springboot跨域问题-HTTP访问控制CORS

1. 谬误形容

其实就还是我上个 guacamole 我的项目的衍生问题，因为要提供一个供外界拜访的接口，以后端页面填入我在其余服务器上安排的 guacamole server 的地址的时候（我用的 firefox 浏览器）在控制台能够分明地看到

CORS 头短少 ‘Access-Control-Allow-Origin’

这些字样

2. 解决

这里先上解决办法，试了好多种只有这个能够

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.context.annotation.Bean;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;


@Configuration
public class GlobalCorsConfig extends WebMvcConfigurerAdapter {private CorsConfiguration buildConfig() {CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.addAllowedOrigin("*");
        corsConfiguration.addAllowedHeader("*");
        corsConfiguration.addAllowedMethod("*");
        corsConfiguration.addExposedHeader("Content-Type");
        corsConfiguration.addExposedHeader("X-Requested-With");
        corsConfiguration.addExposedHeader("accept");
        corsConfiguration.addExposedHeader("Origin");
        corsConfiguration.addExposedHeader("Access-Control-Request-Method");
        corsConfiguration.addExposedHeader("Access-Control-Request-Headers");
        corsConfiguration.setAllowCredentials(true);
        return corsConfiguration;
    }
    @Bean
    public CorsFilter corsFilter() {UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", buildConfig());
        return new CorsFilter(source);
    }
}

创立这个类，而后在须要进行跨域的类下面加上注解 @CrossOrigin
跨域问题就解决了！具体原理我还没了解，了解了补上，这里贴一下帮我解决问题的网址：https://www.w3xue.com/exp/article/20193/23459.html